/** @file
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PCH SPI SMM Driver implements the SPI Host Controller Compatibility Interface.
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Copyright (c) 2013-2015 Intel Corporation.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "PchSpi.h"
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SPI_INSTANCE *mSpiInstance;
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CONST UINT32 mSpiRegister[] = {
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R_QNC_RCRB_SPIS,
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R_QNC_RCRB_SPIPREOP,
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R_QNC_RCRB_SPIOPMENU,
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R_QNC_RCRB_SPIOPMENU + 4
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};
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EFI_STATUS
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EFIAPI
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InstallPchSpi (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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/*++
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Routine Description:
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Entry point for the SPI host controller driver.
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Arguments:
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ImageHandle Image handle of this driver.
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SystemTable Global system service table.
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Returns:
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EFI_SUCCESS Initialization complete.
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EFI_UNSUPPORTED The chipset is unsupported by this driver.
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EFI_OUT_OF_RESOURCES Do not have enough resources to initialize the driver.
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EFI_DEVICE_ERROR Device error, driver exits abnormally.
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--*/
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{
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EFI_STATUS Status;
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//
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// Allocate pool for SPI protocol instance
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//
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Status = gSmst->SmmAllocatePool (
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EfiRuntimeServicesData, // MemoryType don't care
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sizeof (SPI_INSTANCE),
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(VOID **) &mSpiInstance
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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if (mSpiInstance == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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ZeroMem ((VOID *) mSpiInstance, sizeof (SPI_INSTANCE));
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//
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// Initialize the SPI protocol instance
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//
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Status = SpiProtocolConstructor (mSpiInstance);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// Install the SMM EFI_SPI_PROTOCOL interface
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//
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Status = gSmst->SmmInstallProtocolInterface (
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&(mSpiInstance->Handle),
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&gEfiSmmSpiProtocolGuid,
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EFI_NATIVE_INTERFACE,
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&(mSpiInstance->SpiProtocol)
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);
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if (EFI_ERROR (Status)) {
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gSmst->SmmFreePool (mSpiInstance);
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return EFI_DEVICE_ERROR;
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}
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return EFI_SUCCESS;
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}
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VOID
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EFIAPI
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SpiPhaseInit (
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VOID
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)
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/*++
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Routine Description:
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This function is a a hook for Spi Smm phase specific initialization
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Arguments:
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None
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Returns:
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None
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--*/
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{
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UINTN Index;
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//
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// Save SPI Registers for S3 resume usage
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//
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for (Index = 0; Index < sizeof (mSpiRegister) / sizeof (UINT32); Index++) {
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S3BootScriptSaveMemWrite (
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S3BootScriptWidthUint32,
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(UINTN) (mSpiInstance->PchRootComplexBar + mSpiRegister[Index]),
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1,
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(VOID *) (UINTN) (mSpiInstance->PchRootComplexBar + mSpiRegister[Index])
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);
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}
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}
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